bring ADS129x_GPIO headers up to the digital shield
add RS-485 and headers to bnc-shield
improve text label names
fix wrongly labled pin
rename RX to PA8_RX, TX to PA9_TX
rename MISO/MOSI to PA25_MISO/PA26_MOSI, remove forked wires
fix floating labels
rename SPCK to PA27_SCLK
fix more labels